Period 2 elements

Period 2 introduces the elements with two electron shells, from lithium to neon. This row contains carbon, nitrogen and oxygen - the foundations of organic chemistry and life on Earth.

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Category: All elements Nonmetals Noble gases Alkali metals Alkaline earth metals Metalloids Post-transition metals Transition metals Lanthanides Actinides

Period: 1 2 3 4 5 6 7

Group: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18

Block: S P D F

Phase: Solid Liquid Gas

List of chemical elements (8)

Cards Compact Table List

Chemical elements
No.	Symbol	Element	Atomic weight (u)	Density (g/cm³)	Melting point (K)	Boiling point (K)	Electronegativity	Discovered
3	Li	Lithium	6.938	0.534	453.65	1603	0.98	1817
4	Be	Beryllium	9.01218	1.85	1560	2742	1.57	1798
5	B	Boron	10.806	2.08	2349	4200	2.04	1808
6	C	Carbon	12.0096	1.821	-	-	2.55	3750 BC
7	N	Nitrogen	14.0064	1.251	63.15	77.355	3.04	1772
8	O	Oxygen	15.999	1.429	54.36	90.188	3.44	1774
9	F	Fluorine	18.9984	1.696	53.48	85.03	3.98	1810
10	Ne	Neon	20.1797	0.9002	24.56	27.104	-	1898

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Period 2 elements

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List of chemical elements (8)